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Parametric tests (normally distributed data)
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Tests for normality
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Descriptive statistics
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Number of levels / categories in independent variable
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Test of Significance
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1
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One Sample t test
(sample size < 30 / Population SD is not known )
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One Sample Z test
(sample size > = 30 OR population SD is known ) |
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2 (unrelated)
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Unpaired t test (Student's t)
(sample size < 30 )
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Z test (Standard error of difference between two means)
(sample size > = 30 AND population SD is known )
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|
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2 (related or paired)
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Paired t test
(sample size < 30 )
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Paired Z test
(sample size > = 30 AND population SD is known )
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>= 3 (unrelated)
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One way ANOVA
(One independent variable or factor)
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Two way ANOVA
(Two independent variables or factors)
|
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>= 3 (unrelated)
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One way ANCOVA
(One independent variable plus one continuous covariate)
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>= 3 (related)
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Repeated measures ANOVA
(e.g. Test scores: immediately after a course, 7 days after the course AND 1 month after course)
|
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